Check-valve.



G. A. GASE.

CHECK VALVE.

APPLICATION FILED ocT.10. 1912.

1, 1 $QA55O Patented May 11, 1915.

imam Geojyafi w v K. I,

GEORGE A. GASE, OF CLEVELAND, OHIO, ASSIGNOR, BY IVIESNE ASSIGNMENTS, TO THE ICELESS MACHINE COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

CHECK-"VALVE.

Application filed October 10, 1912.

To all whom it may concern:

Be it known that 1, GEORGE A. Gasna citizen of the United States, and a resident of Cleveland, in the county of luyahoga and State of Ohio, have invented certain new and useful Improvements in Check-Valves; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in check-valves and consists of the matters hereinafter described and more particularly pointed out in the appended claims.

In the drawings :Figure 1 is a view representing a vertical section through my im proved check-valve. Fig. 2 represents a fragmentary detail sectional view on an enlarged scale and will be referred to more particularly as I proceed with my specifica tion. Fig. 3 represents a plan sectional view taken on a plane indicated by line 33 of Fig. 2.

Referring now to that embodiment of my invention illustrated in the drawings, the same comprises upper and lower chambered members 5, 6 attached together at their margins by means such as to provide a gas-tight joint. As shown, said members have flanges 5, 6 secured together by means of a union nut 7.

8 indicates a diaphragm made preferably of thin sheet metal, the marginal parts of which are clamped between the flanges of said chambered members. The diaphragm 8 has a central opening 8 in which secured an apertured valve plug 9. The upper and lower ends of said valve plug are formed to provide valve seats 9 9*, for up per and lower ball-valves 10 and 11, respectively. Said valve-plug, as shown, has a radially extending flange 9 which engages the lower face of the diaphragm 8 and. is threaded above the diaphragm to receive a clamping nut 12 which rigidly secures said valve-plug to the diaphragm.

The lower ball-valve 11 is located in a recess 13 in the upper end of a plug 13 which has a threaded stem 13 engaged within a threaded aperture 13 formed in the lower chambered member 6. The lower end of the stem 13 is provided with means for opera- Specification of Letters Patent.

Patented May ilil, 1915,

Serial No. 724,915.

tively engaging it by a screw-driver or like device inserted upwardly through the aperture 13 so as to rotate it and thus adjust it vertically to vary the vertical position of the lower ball-valve 11 with reference to its seat on the valve-plug 9. An oppositely threaded plug 14 is also preferably provided within the aperture 13 below the stem 13 to lock the plug 13 in the proper adjusted position.

The recess 13 in the plug 13 is larger in diameter than the ball-valve 11 and has a flat base 13 on which said ball-valve is adapted to roll. The ball-valve 11 is embraced by a floating plate 15 having an aperture therein of a diameter smaller than the diamete'rof the ball. Saidfloating plate is located above the horizontal plane of the greatest diameter of the ball and acts to retain the ball in the recess 13. The plate 15 is held, as shown,in floating relation in the recess 13 by means of an inwardly extending radial flange 16 formed on a nut 17 threaded upon the plug 13 (as illustrated in Fig. -2). The ball being capable of limited rolling movement on the flat base 13 will be caused to move into a position where it will lit the lower end of the valve plug when said valve plug is depressed upon it. This construction enables the ball to always find a seat against the seat 9 at the lower end of the valve-plug, when said valve-plug is brought into engagement with it.

The lower chambered member (l is provided with a screw-threaded aperture 6 to receive the threaded end of an inlet pipe (not shown) and is also provided with a draining opening 6 inclosed by a threaded plug (3 which, if the occasion so requires, may be used for the inlet opening while the aperture 6 may be closed by means of a. suitable plug. The upper chambered member 5 has a discharge aperture 5 in line with the valve-plug 9 and is provided with an externally threaded boss adapted for connection with a suitable discharge pipe.

In my improved check-valve, the valve plug 9 is normally held from engagement with the lower ball-valve 11 by means of the diaphragm 8, while the upper end of said valve-plug is normally closed by the upper ball-valve 10. It is apparent that fluid may pass from the lower chambered member to the upper chambered member bethan on the inlet side, the ball-valve'lO will automatically.gravitate to its seat 9 thereby closing the aperture in the plug'and the pressure building up upon the upper side of the diaphragm will depress the diaphragm and move the apertured plug .9 to

bring the seat 9 at its lower end into engagement with the ball-valve 11, thus positively closing off any possibility of com-.

munication between the chambersabove and below the diaphragm.- When the pressure 'on the discharge side is reduced. to a pressure lower than that on the inlet side again the diaphragm with the apertured plug will move away from the ball-valve 11 thereby opening communication through the valve as before.

The advantages of my improved checkvalve construction are as follows: In valves of this general type, including a diaphragm, the valve controlled by the diaphragm is normally closed on its seat, and in order for the fluid to pass from the inlet to the out-T let side it must be raised from its seat, thus in practice producing a continuous vibratory movement of the diaphragm. This vibration of the diaphragm causes crystallization, which in time greatly weakens it so that it is easily ruptured. In my improved valve, the valve opening controlled b2" the diaphragm is normally open, being closed only when thepressure on the outlet side is.

The move-- greater than on the inlet side. ment of the diaphragm is thus reduced to a minimum, and its tendency to crystallize greatly reduced. In addition. in my improved valve' only a slight difference between the pressure on the inlet side and the outlet side is required to produce a flow through the valve, since only the small differential required to raise the ball 10 is necessary, my construction being in this respect greatly superior to a check-valve normally held closed by a spring or diaphragm. The manner in which the lower bal -val\e may be vertically adjusted is advantageous in that the adjustment may be made without taking the valve apart. i

I claim as my invention 1. A'check-valve comprising means providing achamber with inlet-and outlet passages. a flexible diaphragm dividing said chamber into inletand outlet compartments communicating with said passages, a valve plug having an aperture 'theretl'irough fixed in an opening in said diaphragm and movable'therewith, said valve'plug being pro-I vided with valve seats at the inlet and outi letends of the opening therethrough, a

movable valve member normally seated upon the outlet end of sald valve plug and a second'valve member agalnst which the inlet end of said valve plug is adapted to seat able therewith, said valve plug being provided with valve seats at the inlet and out- 7 let ends of the opening therethrough, a movable valve member normally. seated upon the outlet end of said valve plug-irrespectwo of its movement, a second valve member against which the inlet end of said valve.

plug is adapted to seat when depressed being movable to automatically conform to its seat in the valve plug, and means for adjusting the position of said second valve member with reference to its seat.

3. A check valve comprising means providing a chamber with inlet and outlet passages, a flexible diaphragm dividing said chamber into inlet and outlet compartments communicating with said passages, a valve plug having an aperture therethrough fixed in an opening in said diaphragm and movable therewith, said valve plug being pro vided with valve seats'at the inlet and outlet ends of the opening therethrough, a movable valve member normally seated upon the outlet end of said valve plug anda second transversely movable valve member against which the inlet end of said valve plug is adapted to seat when depressed.

4.,A check valve comprising means providing a chamber with inlet and outlet-passages. a flexible diaphragm dividing said chamber into inlet and outlet compartments valve plug being provided with valveseats at its inlet and outlet ends, a ball normally seated upon the outlet end of said valve plug, and a second ball capable of limited horizontal rolling movement againstwhich the inlet end of said valve plug adapted.

to seat when depressed.

5. A checkvalve comprising a casing having a chamber, with inlet and outlet passages. aflexible diaphragm dividing said chamber into inlet and, outlet compartments communicating with said passages, a valve plug carried by the diaphragm, movable therewith and having anopening there- 'through. a movable valve member closing the outlet end of said opening, and a laterally movable valve member closing the inlet mee eee two balls seating in the respective ends of the tubular plug.

In testimony, that I claim the foregoing as my invention I affix my signature in the 1:

presence of two Witnesses, this 5th day of @ctober D. 1912.

enoeen A. ease.

Witnesses:

QLARENOE E. MEHLHOIPE, H. H. SOUTHWORTE. 

